From our experience, we only recommend trading on the following exchanges:

Bitcoin Futures
Bitmex (http://bitmex.whalepool.io/) – Proven track record, available in the whalepool telegram chat also. A great platform with high leverage available

Altcoins
Binance (http://binance.whalepool.io/) – A new comer to the altcoin scene rapidly gaining popularity for shitcoins. Run & administered by the ex-Okcoin CTO. Seems very popular with a better UI & selection than bittrex

Bitcoin Options
Deribit (http://derbit.whalepool.io/) – A newcomer to the scene but growing rapidly. Used by Whalepool users for some time now as the prefered way to trade bitcoin options. Ask Saj any question in telegram.

Forex/Commodity/Stocks
1broker (http://1broker.whalepool.io/) – Without a doubt, the cheapest & best CFD platform to use with your bitcoin. Including copy trade features. Proven track record. 1broker reps also available on teamspeak